<template>
  <div class="login_container">
    <div class="login_box">
      <!--        头像区域-->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!--        登录表单区域-->
      <el-form
        :model="loginForm"
        :rules="loginFormRules"
        ref="loginFormRef"
        label-width="0px"
        class="login_form"
      >
        <!--          用户名-->
        <el-form-item prop="username">
          <el-input
            prefix-icon="iconfont icon-ziyuanxhdpi"
            placeholder="请输入用户名"
            v-model="loginForm.username"
          ></el-input>
        </el-form-item>
        <!--          密码-->
        <el-form-item prop="password">
          <el-input
            prefix-icon="iconfont icon-mima"
            placeholder="请输入密码"
            v-model="loginForm.password"
            type="password"
          ></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="clickLogin">登录</el-button>
          <el-button type="info" @click="resetLogin('loginFormRef')"
            >重置</el-button
          >
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>
<script>
export default {
  name: 'login',
  data() {
    return {
      // 表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 表单的验证规则对象
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 6, message: '长度在3到6个字符之间', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 10, message: '长度在6到10个字符之间', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 登录表单重置
    resetLogin(loginRef) {
      // this为表单的实例对象
      console.log(this)
      // 拿到表单的引用对象调用resetFields()方法
      // this.$refs.loginFormRef.resetFields()
      this.$refs[loginRef].resetFields()
    },
    // 点击登录
    clickLogin() {
      // 实现登录前的预验证
      this.$refs.loginFormRef.validate(async valid => {
        // console.log(valid)
        if (!valid) return
        // this.$http.post('login', this.loginForm) 返回值为promise,await简化操作，使用await必须被最近的async方法修饰
        const { data: res } = await this.$http.post('login', this.loginForm)
        // console.log(res)
        // if (res.meta.status !== 200) {
        //   console.log('登录失败')
        // } else {
        //   console.log('登录成功')
        // }
        res.meta.status !== 200
          ? this.$message.error('登录失败')
          : this.$message.success('登录成功')
        // 登录成功服务端会返回token，将token保存到客户端的sessionStorage中
        window.sessionStorage.setItem('token', res.data.token)
        // 编程式导航跳转到主页
        // console.log(this)
        await this.$router.push('/home')
      })
    }
  }
}
</script>
<style scoped>
.login_container {
  height: 100%;
  background-color: #2b4b6b;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  width: 130px;
  height: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;
}
img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: #eee;
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 5px 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
